Super Alloy Udimet 520™
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- Published on Monday, 07 January 2013 14:09
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Introduction
Super alloys or high performance alloys include iron-based, cobalt-based and nickel-based alloys. These alloys have good oxidation and creep resistance and are available in different shapes.
Super alloys can be strengthened by precipitation hardening, solid-solution hardening and work hardening methods. These alloys can function under high mechanical stress and high temperatures and also in places that require high surface stability.
Udimet 520™ is a nickel-chromium-cobalt alloy. Addition of tungsten and molybdenum result in age-hardening and strengthening of this alloy.
The following datasheet provides an overview of Udimet 520™.
Chemical Composition
The chemical composition of Udimet 520™ is outlined in the following table.
Element Content (%)
Nickel, Ni 52.18-59.976
Chromium, Cr 18.0-20.0
Cobalt, Co 11.0-14.0
Molybdenum, Mo 5.50-7.00
Titanium, Ti 2.90-3.25
Aluminum, Al 1.80-2.30
Tungsten, W 0.800-1.20
Carbon, C 0.0200-0.0600
Boron, B 0.00400-0.0100
Physical Properties
The following table shows the physical properties of Udimet 520™.
Properties Metric Imperial
Density 8.21 g/cm³ 0.297 lb/in³
Melting point 1371°C 2500°F
Mechanical Properties
The mechanical properties of Udimet 520™ are displayed in the following table.
Properties Metric Imperial
Tensile strength (@950°C/1740°F) 350 MPa 50800 psi
Yield strength (@strain 0.200%, temperature 850°C/strain 0.200%, temperature 1560°F) 500 MPa 72500 psi
Elongation at break (@50°C/122°F) 100% 100%
Fabrication and Heat Treatment
Annealing
Udimet 520™ is annealed at 1107°C (2025°F) and then cooled in air rapidly.
Cold Working
Standard cooling methods are used for cold forming Udimet 520™. Minimization of galling is possible with the usage of heavy duty lubricants and soft die materials though the die life is limited. Tooling is recommended in the cold working process to allow liberal radii and clearances.
Welding
Welding processes recommended for Udimet 520™ include gas-tungsten arc welding, gas metal-arc welding and shielded metal-arc welding. This alloy can be welded by the commonly used welding procedures, and the welding surfaces should be free from paint, crayon markings or oil.
Forging
Udimet 520™ is capable of being forged as it is ductile.
Forming
Conventional methods can be used to form Udimet 520™ with ease as it has good ductility. To obtain good forming results, a powerful equipment is used along with heavy- prevent embrittlement of this alloy at high temperatures.
Machinability
Udimet 520™ can be machined by conventional machining methods. and tThis alloy contains higher strength, gumminess and work-hardening qualities. Usage of water-based coolants is preferred for milling, turning or grinding. Usage of heavy lubricants is preferred for boring, drilling, broaching or tapping operations. Work-hardening of the alloy before the cutting process and chatter can be minimized by tooling and a heavy duty machining equipment.
Aging
Udimet 520™ is treated at three different temperatures to be air-hardened.
Heat for 4 h at 1107°C (2025°F) and cool in air.
Heat for 24 h at 843°C (1550°F) and cool in air.
Heat for 16 h at 760°C (1400°F) and cool in air.
Heat Treatment
Udimet 520™ can be hardened when heat treated.
Applications
Udimet 520™ is used in gas turbine hot section components and industrial applications that need hot high heat strength with good quality.
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The Hobbit: Unexpected Gift Ideas from Middle-earth
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- Published on Monday, 07 January 2013 13:51
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Dwarven treasure map – Have you ever wanted to reclaim your homeland and the treasures that are your birthright? Well now you can with a prop replica of Thorin Oakenshield’s map to The Lonely Mountain from The Hobbit: An Unexpected Journey, complete with hidden Moon Rune text that can only be seen in the moonlight (well, any light will work, but won’t be as much fun.) If the $200 price tag is a little too much, with all your gold currently being horded by an ill-tempered dragon and all, you can always opt for the $30 parchment version of the map.
The Lord Of The Rings: The One Ring – This ring may not give you the power of invisibility, but that’s okay, because you’ll want your friends to be able to see your good taste as you sport this gold plated tungsten carbide One Ring replica that is stylishly decorated with Elvish runes reading, “One Ring to rule them all. One Ring to find them, One Ring to bring them all and in the darkness bind them.” This is guaranteed to be the most precious gift of all!
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3D Printing for Manufacturing: Hype or Reality?
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- Published on Monday, 07 January 2013 11:17
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In the past, 3D printing for manufacturing, or "additive manufacturing," had been primarily used as a rapid prototyping tool for plastic parts. However, the sphere of applications is expanding as use of printable metal alloys, such as tungsten and titanium, gains traction. Creating prototypes is still the dominant application; however, the technology has matured to the point where manufacturers can use it to complement or replace traditional production processes.
Leading manufacturers are now looking at potential 3D printing applications in multiple areas to determine where it could save time or costs. For production processes, it appears that 3D printing can provide the most benefit for manufacturers seeking to move toward smaller production quantities.
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Ladbrokes World Darts Championship 2013: Phil Taylor claims sweet 16th title
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- Published on Monday, 07 January 2013 11:28
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With a sparkle in his eye, a spring in his step and a throat lozenge in his mouth, Phil Taylor on Tuesday night won the PDC World Darts Championship for the 16th time.
The greatest player ever to hurl a dart, the Power picked up the Sid Waddell trophy after beating the young Dutchman Michael van Gerwen by seven sets to four. And, as the great commentator after which the huge bauble is named would have put it, in winning Taylor proved he has tips of tungsten.
One thing is for sure, across his previous 15 titles, Taylor can have faced few challenges as intense as the one presented here by the young Dutchman. At one point he was 4-2 down, with Van Gerwen, the chucker who appears not to aim, hitting a speedy succession of magnificent trebles. As the 23 year-old from Boxtel in the south of the Netherlands moved apparently inexorably towards becoming the youngest man ever to win the crown, Taylor was sucking on his flights, shifting uncomfortably in his over-sized shirt and mouthing “what can you do?” to the boisterous Alexandra Palace crowd.
It was a fair question. Van Gerwen, whose square-mouthed yells of celebration really ought to carry an 18 certificate to prevent vulnerable youngsters suffering nightmares at the sight of it, looked unassailable. He was out-Tayloring Taylor. As he threw nine 180s, everyone in the arena was asking: what exactly could anyone do against such a force of darts? Not even the Power had an answer to this.
Well, what Taylor could do was to dig deep and produce some of the finest throwing ever seen, even in his imperious reign on the Ally Pally’s giant red stage. At 52, three years after he appeared to have relinquished his grip on the world title, Taylor showed absolutely no intention of falling to the exigencies of time.
Age does not appear to wither the man from the Potteries. Demonstrating precisely what it is that has made him the most decorated player in darts history, he clawed his way back, averaging over 103 for every three darts he threw, chucking in five 180s, finishing with a double 16 and throughout the final providing a masterclass in nerveless application.
And he needed to. Make no mistake, Taylor was up against it here. The Matt Lucas lookalike Van Gerwen is already a superb competitor, a player of flair and flamboyance, whose storm to the final had encompassed darts of a kind rarely before delivered in this competition, even by Taylor. His near double nine-dart finish in the semi-final had seasoned observers fearing for old guard’s prospects here.
“He’s phenomenal that kid, I just couldn’t seem to crack him,” said Taylor afterwards, his voice threatening to crumble with emotion. “He’s one of the best players I’ve ever seen in my career. I am absolutely over the moon, I’m so proud tonight.” As Taylor swung the competition his way, slowly, relentlessly reeling in his opponent, the hugely boisterous, fancy-dressed crowd filling the Alexandra Palace chanted his name to the echo. They were all, they insisted, walking in a Taylor Wonderland. And this after many had booed him to the oche at the start, keen to express their displeasure at his graceless reaction to his semi-final win over Raymond van Barneveld. But then the darts Taylor produced here had that effect on people: there was no other response than to stand and loudly acknowledge his brilliance.
What an evening they were having in the crowd, toasting their good fortune at being present at the self-styled “hottest ticket in sport”. Indeed, it was clear that Alcohol Concern’s Dry January campaign had singularly failed to establish a foothold in Alexandra Palace on Tuesday night. Drink was everywhere in evidence; the place was awash in beer.
But then, this has always been a thirsty competition. A few years back at the final, I was queuing up at the bar behind a fan who, when his turn came, ordered 20 pints of lager. The barman, evidently not amused at the scale of the order, rolled his eyes and sighed ostentatiously.
“Sorry about that,” came back the fan, by way of excuse for his demand. “But there are four of us.”
As it turned out, however, there was little need for any outside assistance to achieve a gleeful dose of seasonal good cheer. Taylor’s exhibition was elevated enough to lift any mood. Never mind that his vocation requires nothing more physical than an occasional walk of a couple of yards to retrieve his arrows from the board, Taylor demonstrated here the kind of mental resolve that is rare in any kind of athletic pursuit. He simply refuses to countenance defeat. And as he does so, you can almost feel the waves of certainty undermining his opponent.
As he began to claw his way back into the match, first equalising the sets, then opening up a lead, Van Gerwen seemed to shrink before him. The Dutchman missed doubles, missed chances, missed doing what earlier in the evening had appeared to be second nature to him. And the more he missed, the more the wry smile played on the old champion’s lips. He knew he had him. He knew he was about to remind us all who really is the boss around here.
Afterwards, as he basked in triumph, a winner’s cheque for £200,000 in his pocket, Taylor made no mention of the threat to retire he had issued ahead of this final.
“They got me through this,” he said of the crowd.
And as he spoke, thrilled by the response to his victory, he did not look like a man keen to depart the scene at any time soon.
For which those of us lucky enough to witness his performance can be profoundly grateful. Quite simply, this was an act of true sporting genius.
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Winter tech 2014 - All-weather winter tyres
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- Published on Monday, 07 January 2013 10:49
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If you live in Scandanavia, you probably take great pride in showing visitors from warmer climes your tungsten-studded winter tyres. Yet keep strangely silent on the amount of swearing you do twice a year when you have to change them. When we’ve got a set of auto-adjusting all-weather tyres we might come and visit you again. Less tyre chat next time, please.
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